321135307 has 4 divisors (see below), whose sum is σ = 321288136. Its totient is φ = 320982480.

The previous prime is 321135277. The next prime is 321135317. The reversal of 321135307 is 703531123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321135307 - 2²⁷ = 186917579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321135317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73218 + ... + 77479.

It is an arithmetic number, because the mean of its divisors is an integer number (80322034).

Almost surely, 2^321135307 is an apocalyptic number.

321135307 is a deficient number, since it is larger than the sum of its proper divisors (152829).

321135307 is a wasteful number, since it uses less digits than its factorization.

321135307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152828.

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 321135307 is about 17920.2485194821. The cubic root of 321135307 is about 684.7983188026.

The spelling of 321135307 in words is "three hundred twenty-one million, one hundred thirty-five thousand, three hundred seven".